Rubber tire.



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PATENT OFFICE.

VOODBURN LANGMUIR, OF NEV YORK, N. Y.

RUBBER TIRE.

SPECIFICATION forming part of Letters Patent N0. 627,672, dated June2'?, 1899. Application filed March 10, 1899. Serial No. 708,482. (Nomodel rubber tire more durable, more resilient, and

requiring less rubber than those at present in use.

In the drawings, Figure 1 shows lny improvement having a multiple-plybase and as attached to a wheel having flaring flanges; Fig. 2, amodification of the same having onlyl a single-ply base and` held -inplace by a metal band instead of wires, as in Fig. l; Fig. 3, the tireapplied to a wheel with straight iian ge Fig. 4, a modification in theshape of the tire. Fig. 5 illustrates the application to asmall wheel.

Like parts are represented byfs'imilar reference-letters in the severalfigures.

In all the figures, A represents the felly of Y the Wheel;A B, theflanges; C, the rubber tire; D, the reinforcing base-strip w w, themeans for holding the tire in the flange, and s s the space between theiiange and the tire.

In present tires it is customary to give such a shape to the tire andvehicle-fiange that the exposed sides of the tire are formed at an angleto each other and also to the iianges of the wheel-rim. Moreover, theunexposed por? tion of the tire, or that portion which is inclosedwithin the rim, is formed t0 substan-v tially'the same shape as theinner channel of the rim-that is to say, it is tapered from theV outsideinwardly, so that the sides of the inner or'unexposed portion of thetire form withv the sides of the exposed portion an obtuse angle. Asample of this construction is shown in the patent to A.W. Grant, No.554,67 5, dated February 18, 1896. In absolute contradis'- tinction tosuch a shape and arrangement of parts my tire does not conform to theshape of the flange or of thevchan'nel. Moreover, the sides of my tireare practically a straight line forming an angle with the base withoutreference to the angle between the flanges and the base. One of theessential features of my tire is that whether the flanges be flaring orstraight its shape leaves between the tire and the anges a V or wedgeshaped space, and this for the purpose that others attempt toavoid-viz., the lateral displacement of that portion of the tire betweenthe flanges of the wheel. Furthermore, as distinguished from previousshapes my tire is .Widest not near the top of the-flanges, but at thebase. y

Ican use either a single or multiple ply canvas; but'I prefer themultiple ply for reasons to be hereinafter setforth.

The following are the disadvantages of existing constructions which Ipropose to rem= edy in my improved tire: First, the flanges .cut intothe tire at the angle where they meet,

thereby allowing the rubber immediately above the flange to projectbeyond the same when under load; second, vthat portion of rubber withinthe channel is useless as a cushion, the channel being entirely filledwith practically dead rubber; third, the portion of the rubber embracedin the angle between the unexposed and the exposed part'of the tire .isuseless; fourth,a tendencyto creep by reason of its longitudinalcompression; -fth, a tendency to open at the joint; sixth, a

tendency to split at the wire holes; seventh,

the necessity for longitudinal compression.

My improved construction has the following advantages accruing from itsshape: First, the entire depth of the tire is available for apcushion;second, the entire width of the tire remains within the flanges; third,thereis an economy of rubber in its construction, and the tire, owing toits greater `depth 0f cushion, is more durable; fourth,

under load, there being space between the sides of the tire and theflanges, the tire simply fills up this space from the base upward,thereby keeping out dirt and other foreign matter.

Referring to the advantages of multipleply fabric, I claim that itprovides, first, the tire with a longitudinal resistance sufficient topermit the elimination of compression heretofore employed to prevent thetire from opening at the joint and to leave the periphvreryfin a normalcondition; second, it in- IOO creases the lateral resistance of thetire, at the same time being suiiciently pliable to yield with the tireunder severe side strains; third, I am enabled to eut my tire to theexact circumference of the wheel, thereby eliminating the compressionand leaving the periphery or wearing-surface of the tire in aslightly-stretched condition, thus providing for the elongation thattakes place in usage. eing enabled to cnt my tire substantially to thecircumference of the wheel, I econoinize in rubber, saving severalinches on each lire. By my construction, in which I eliminatecompression, I lessen the tendency of the tire to creep, and therebyreduce the circumferential strain on the retaining-wires.

Having thus fully set forth and illustrated my invention, what I claimisl. In a wheel for vehicles, the combination of a channel having aflanged rim, a solidrubber' tire tapering from the base so as to leave aV-shaped space between the fianges oi the rim and the sides of the tire,and wires for retaining the tire within said clianncl,sub stantially asdescribed.

2. A vehicle-wheel having a metallic rim, with flanges projecting toform a channel or groove with straight or inclined sides, a rubber tire,the base of which is adapted to rest in said groove or channel, thesides of the tire forming an angle with the base, and leaving a V-shapedspace between the tire and the rims of the channel, andindepeudentretaining-wires, passing entirely through the inner portionsof said tire, and also within the outerperipheries of the flanges,substantially as described.

A vehicle-wheel having a metallic rim, with flanges projecting to form achannel or groove with straight or inclined sides, a rubber tire, thebase of which is adapted to rest in said groove or channel, the sides ofthe tire forming an angle with the base and leaving a V-shaped spacebetween the tire and the rims of the channel, and independentretaining-wires, passing entirely through the inner portions of saidtire, substantially as dcscribed.

Signed at New York, in the county of New York and State of New York,this 6th day of March, A. D. 1899'.

VOODBURN LANGMUIR.

Witnesses:

ORLANDO M. 'lHowLEss, W. SEMIEN.

